The car park at Tweedbank (which is huge) was overflowing yesterday (cars parked on verges/pavements/all over the place) mid afternoon, just before one of the steam specials (Tornado) was due to depart.
Overheard some locals grumbling about the lack of toilet facilities at the station.
Another observation was the fairly narrow strip of path (perhaps 1.5m?) running by the station fence (which, pre-railway, was a NEPN sized path). But in fairness they have had to squeeze in to tracks and a platform at this point and there *is* still a path.
Later in the afternoon a Border's Rail 'ambassador' at Stow station told us that many of the trains she had seen were standing room only, or couldn't accommodate new passengers.
However there were seats on the 4pm to Edinburgh and even the couple with bikes got on.